Members of the task force had told ProPublica the state's abortion ban had led to women's deaths.

The ballot initiative in Florida would have allowed abortion until the point of foetal viability or about 24 weeks.

Strategists say the issue could drive more voters to the polls in some crucial swing states.

Of all the US abortion ballot measures, the one in this conservative state will be most closely watched.

In an impassioned speech, Michelle Obama said the election was "too close" with 10 days left until election day.

Trump pitches the economy and immigration as kitchen-table issues, but faces some pointed questions.

Her apparent support of abortion access puts her at odds with her husband, who has taken credit for helping to overturn Roe v Wade.

The ruling could open abortion access in the US South, where several states have severely limited access to the procedure.